Jack Sock defeated Kei Nishikori 7-6 6-4 in the Shanghai Masters round of 32 on hard. The upset overturned the form book — Kei Nishikori came in defending last year's round of 16. Jack Sock extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-03-06 | Indian Wells Masters | QF | hard | Jack Sock | 6-3 2-6 6-2 |
| 2013-07-29 | Washington | R32 | hard | Kei Nishikori | 7-5 6-2 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (199 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About